Caneield



A. J. CANFIELD. I

METHOD OF MAKING DRAFT GEAR YOKES.

APPLICATION FILED mmzs, 1920.

Patented Aug. 10, 1920.

ARTIHUR J. GANFIELD, or MONTBEAL,-;.IQUEBEG, oAnAnA.

' 'METHOD OF MAKiNG DRAFT-GEAR yoxns.

Application filed March 25, T1920. seri ljmlaessoe.

To all whom it may mm.-

Be it known that I, ARTHUR J. CANFIELD,

a citizen of the United States, andresi'dent J of the city of Montreal, in the Province of Quebec and Dominion of Canada, have invented certain new and useful Improvements in Methods of Making Draft-Gear Yokes, of 1 be "primarily formed to: substantially the shape shown-in Fig. 2,1 thus omitting the step shown in Fig. ,1. The possibility of I producing a form substantially as shown in Fig.2 at the first operation depends upon which the following is a full, act description. v I I This invention relates to improvements in method or process of making draft gear clear, and exyokes, and theobject of the invention is to provide an inexpensive and expeditious method of manufacturing yokes in'one piece without any seams or joints, so as to comply with M. C. B. regulations. 3

According to the present invention, a bil let is pierced so'as to form, atubular or hollow'body closed at one end; Thistubular body is fiattened'eith'er during formation or subsequently andis'then'formed by various operations performed in suitable sequence,

preferably into a fini'shed yoke:

In the drawings vention Figures 1 to 5 inclusive arexperspective views illustrating'various stages of the com-;

pleted yoke.

Fig.6 is a perspective view of the-com I I The enlarged portion of the flattened pleted yoke.

for example in Fig. 2, thus providing two opposite flat sides 14 that maybe termed top and bottom, the bottom being of course invisible, and two remainingsides 15. The

thickness from top to bottomfand, if desired, the width from side to side may be sl ghtlygreater in a portion 16 toward the open end.

This enlargementI permits an enlargement of the bore, so that the depth of the borein' the enlarged portion maybe substantially equal to the over-all depth inthe remaining portion. The top and bottom of the en larged portion 16 form jaws 17. adapted to embrace the shank of a coupler. The jaws may be thickened to form bosses 18. at the outer ends of and, if desired, surrounding.

the key slots 19. The top and'bottom'are provided with openings 20 to permit insertion of the draft gear.

In making the yoke, a billet or the like,

'let having unequal diameters is used, it will bepossibleito roduce a fo m substantially asishownin' ig. 2 at the first operation. 'The, body may'alsobe formed under these, conditions 'withitssides flat," as shown in Fig. 4, insteadof rounded, as shown "in Fig. I 2, thus eliminating a subsequent operation of flattening-the sides. Itwillbe'. noted that which illustrate the either roundor rectangular incross section, I I

. speeificatio of iettersIt'atent. leate tedA gefio, 192

is placed in a suitable die and pierced to produce thetubular' body 11. The bod when firstpierced may be of the cylindrica shape 'shown'in Fig. and may be afterward flat- Itened to-the form shownjnfFig. 2, ori may thetemperaturef and the quality of materialand alsolupon the shape of the billet- .7

thekbilletto theform shown in 1 and j then flatten the piercedbillet" to produce the form shown in Fig. 2; If a rectangular bilthe flattened body shown in Fig. 2 .isof greater depth adjacent 'its, open: endfthan 4 adjacent its closedend.

body towardthe open end/1s now cut .away

flame or electric arc. This resolves the bottom'and top of the bodyi intoseparate "and distinct jaws ofapproximatelysuitablepro-5 i extremities toform bosses 18,the jaws being at'j the same time slightly sprung apart if desired. During this operation,'the sides,

'15 of the body may be fiattenedif this has i notbeen already done. I I The formed andupset .bodyis now placed in a punch press. and the key s1ots'19 as sufficient thicknessof metal is maintained atf'thesidesby anyfsuitable means such as] shearing or burning with an oxyacetylene 'The body isthen placed insuitable dies: v I

andthe jaws 17 upset orjthickened at their at the ends of the jaws; Therefore bosses at the tipsofthe jaws reaching only to the] I no The top and bottom of the flattened body between the enlarged part 16 and the closed end 12 are now cut away to substantially the extent sh'ownin Fig. 6, foriningop'enings 20 through which the draft gear may be inserted. This cutting out of the'top and bottom may be done in any suitable manner, such aspreviously indicated in connection with the forming of the jaws, but

is preferably done mechanically in order 'Frointhe foregoing description, it will be seen that the yoke isproduced from a single 'M. C. B. requirements.

piece of metal without seam or joint of any description and therefore complies, with 7 Owing to the fact that the yoke is forged from a singlevpiece of metal, the maximum strength will be obtained and any flaws or soft spots in the "metal will be eliminated, so that the finished yokes will be of uniform strength.

Having thus described my invention,

7 what I claim is ll A method of making draft gear yokes and the like, which comprises piercing a,

billetto form a hollow body open at one end and closed at the other end, forming jaws at the open end of the body, and opening the body between said jaws and the 1 closed end of the body for the reception of 7 end and closed at the other end, forming draft gear.

2. A method of making draft gear yokes and the like, which comprises piercing a billet to produce a hollow body open at one and the like, which comprises piercing a billet to produce a hollow body open at one end and closed at the other end, roughforming jaws at the open end of said body by removing diametrically opposite portions of the metal, [and finally-shaping the jaws v by upsetting and opening the body between the jaws and the closed end of the body.

4. A method of, making. draft gear yokes, which comprises forging a billet to produce ahollow body rectangular in cross section and closed atone end and open at the other end, forming jaws at opposite sides of the open 'end of said billet, and opening the sides of thebillet carrying the jaws.

. 5. A method of making draft gear yokes and the like, which comprises piercing a billet to. produce a hollow body closed at one end and open at the other end, flattening the body toform top, bottom and side surfaces, forming jaws on the top and bottom surfaces by cutting away. the material of the side surfaces, and opening the body by'cutting away material of the top and bottom between the jaws and the closed end.

6. A method ofmaking'draft gear yokes, which comprises piercing a solid billet to produce a hollow body closed atone end and open at the other end and subsequently treating the hollow body to form jaws at the open end and openings for the draft gear between said jaws and the closed end of the body.

In witness whereof, I have hereunto set my hand.

ARTHUR J. CANFIELD. 

